Brake mechanism



July 3, 1928.

V, BENDIX Filed Apri INVENTOR VQNCENT BENDlx Sblfgfrlmfn ATIORNEY July 3, 1928. 1,675,526

v. BENDIX BRAKE MECHANISM Filed April '7, 1926 2 Sheets-Sheey 3 INVENTOR VINCBNT BENDIX .aA/5W ATTORNEY Patented Julye, 192s.

UNITED STATES PATENT OFFICE;

VINCENT BENDIX, OF CHICAGO, ILLINOIS, ASSIGNOR T0 BENDIX BRA-KE COMPANY, 0F i CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE MECHANISM.

Application filed April 7,

This invention relates to brakes, and is illustrated as enibodiedvin several types. of automobile brakes and operating mechanism ltherefor. An object of the invention 1s to provide novel and simple self-equalizing operating mechanism` for the brake, preferably including a toggle acting on theshoes, the mechanism in the forms illustrated being especially Well adapted for use on brakes for front or other swivelled wheels. The illustrated forms have the further advantage that theyv may be used for applying a floating or servo Shoe which moves with the drumto apply another slice;

Other important minor features of novel ty include various improvements in the brakes, to adapt them for use withcontrols of the sort described7 and to other novel combinations of parts and desirable particular constructions shown in the accompanying drawings, injwhch: f

Figure 1 is a vertical section transversely throughjone front brakefand through associated parts; 1 'j Figure 2 is'avvertical section through the brakeon the line 2-2 of vFigure-A1, showing the brakeshoes in side elevation ;v

'Figure 3 isasview corresponding to Figur-e- 2, but l'sl'iowing a different brake;

.Figure 4. is a view' corresponding to the upper part of F igure' 2 and of Figure 3, but showing a third brake; and f Figure 5 i's a partial section onl the line 5-5 of Figure 4, and showing the shiftable anchorage of this type of brake. .y

The arrangement shown Ain Figure 1 includes a drum 10 rotating with a Wheel (not shown) mounted on the spindle "12: of a knuckle 14 swivelled, by a kin pin 16 or the like, at one end of a front ax e 18 which...

with a rear axle (not shown), supports a suitable chassis frame 20 through the usual springs 22. At the open side of the drum is arranged rva stationary support such as a backing plate 24.

The brake illustrated in Figures 1 and 2 includes a reverse shoe 26 'anchored on a,

pivot 28 on backing plate 24, anda pair of shoes 30 and 32 pivotally connected at 34 and anchored on a pivot 36. Pivot 28 for shoe 264 passes through a relatively large opening in the web of shoe 32, while pivot 36 passes' 1926` Serial No. 100,257.

through a relativelylarge opening in shoe 267 thus in effect overlapping shoes 26 and 32. Shoe 32 is held .by a spring 38 against van adjustable stop 40, while shoes 26 and 30 are urged by a connecting spring' 42 against adjustable eccentric stops 44.

The brake may be applied' by suitable means, such as a shaft 46 operated by an arm 48 and slidably and universally sup ported on frame 20 by a support 50, acting through a novel toggle niechanismfto force shoes 26 and 30 apart toward the drum against the resistance of spring 42. The

-outer end' of shaft lI6 is flattened land swiv'- elled a pin 52 between .two outwardly cylindrical connecting devices' 54 received in a cylindrical cross bore in the end of a shaft 56 journalled in a bracket 58 securedvto the Vbacking plate.

Shaft 56has an extension 60, preferably integral, to. which is fixedly secured an'aiim `62-operating a tension link 64 conriected t0 the knuckleof a toggle including llinks 66 of shoes 26 and 30. v- Y The brake of Figure 3 differs from the one just described, in tha-tthere are only two shoes 130 and 132,.correspondin in a ge'- and 68'connected respectively to the ends- 80. eral way to shoes 30 and 32, van which are pivotally connected at 134 and p'ivotally lari-f chored at 136.. A spring 138 holds'shoe 132 against a stop 140 until Aovercome byl move- Y ment of shoe 130, while a spring 142y tensioned between theY shoes urges -shoe 144 againstuanother stop 130.

The brake'of Figure 4 is like that of AFigure 3, except that shoe 232 is not anchored by being mounted on api-vot. In this brake,

if the drumis turning counter-clockwise, the

..244 on t e opposite end of the bracket. This brake is,y intended to be so arranged that-the' drum is turning counter-clockwise in Figure- 4-when the vehicle is moving forward '(as is also true of Figures 2 and' 3), so that normally shoe 232 does no t' leave its anchorage when the brake is applied, shoe 230 turning with the drum Ito overcome spring'138 and force shoe,.232 against the drinn.

While several illustrative brakes have been described in detail, it is not my invention to limit tli'e scope of the invention to those particular brakes, or otherwise than by the terms of the appended claims.

I claim:

1. Brake mechanism comprising, in conibination, a swivelledA wheel having a brake w'ith adjacent separable ends, a short shaft between said ends swivelling with th'e wheel andV having an armlat its outer end and a jcross bore in its innerend substantially at fthe swivelling axis of the wheel,a.n operatj ing vshaft having a connecting device in the crossv bore, and a brake-applying toggle linked to said arin.

A2. Brake mechanism comprising, in combination, a' swivelled wheel having'a brake With adjacent separable ends, a short shaft between saidends swirelling withthe wheel and having an armat its outer end and having its inner end substa.iitially"at .the swivelling axis ofthe wheel, an operating shaft universally-jointed to the cnd of the short shaft, and a brake-applying toggle linked to brake and extendingtoward the axis of thewheel and pivoted together to form a toggle, and a connecting link extending from the toggle to said arm.

4. Brake mechanism comprising, in coin- Abination, a. drum, a lixed support including a journal bearing, a friction devicev anchoring at one end on the support when the drum is turning in one direction and anchoring at the other end on'the support when the drum is turning in the'otlier direction, a shaft in' the bearing havingan arm at itsend, and toggle links connect-ing said arm to the ends of the friction device.

5. Brake'mechanism comprising, in combination, a drum, a fixed supportA including a journal bearing,'a friction device anchoring at one end on the support when the drinn is turning in one direction and anchoring at the other end on the journal bearing when the drinnis turning in the other direction, a sha-lit in the bearing having an arm at its end, and toggle links connecting said arm to thc ends of the friction device.

(S. Brake mechanism comprising, in combination, a drinn, :i support having a journal A bearing at one'end and a flange at the other end, a friction device anchoring on the flange when the drum is turning in one direction and on the bearing when the druni is turning'in the other direction, a. shaft in the bearing, and lmeans operated by the shaft for forcing the nnancliored one of said ends against the drum.

7. Brake mechanism comprising, in combin-ation, a drum, a support having a journal hearing at one end and a flange at-the other end, a friction device anchoring on the flange when the drum is turning in one direction and on the bearing when 4the drum is turning inthe other direction,'a.shaft in l the bearing, and connections from the shaft to said ends extending between the flange and the bearing.

S lirakc mechanism comprising, in conibination, a drinn, a support having-a concave flange at one end and a rounded bearing at-tlie other-end, a friction device having a rounded end-arranged to anclioiin the' concave flange when the drinn 1s turning. in

one direction and .having-a concavev end arranged to anchor on the bearing when the d riiin is turning in the other`direct1on,` a

shaft i'n thebearing, and means operated by against the drum.

the shaft 'for forcing thef-riction device 9. Brake` mechanismconiprising,"in combination, ,a drum, a support having a concave flange at one end and a roundedA part at the other end, a friction device having a -roiinded cnd'arranged to anchor in the concave flange when the drum is turninfy iii one direction and having af concave enc arranged to anchor on saidv part when the druii is turning in the other direction,and

means for forcing' the friction de vice against In testimony` wher of, I have 4hereunto signed my name. VINCENT BENDIX.I 

